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today's leftovers

Submitted by Roy Schestowitz on Monday 9th of August 2021 10:41:01 AM Filed under
Misc
  • A beautiful power tool to scrape, clean, and combine data

    All the ingredients are lying around in plain sight, but the effort required to combine them winds up being more trouble than it’s worth. And that’s for me, a skilled longtime scraper and transformer of web data. For you — even if you’re a scientist or a journalist! — that may not even be an option.

  • A Brief Intro to Monad Transformers

    A few friends have recently asked about literature introducing Monad Transformers. The best introduction I have found was in Haskell Programming From First Principles. If you don't have, or want to purchase, this book, then here is a brief explanation with examples.

    Lets start with the problem they solve.

  • TWC 124: Literalism and existence proofs in the service of stress reduction
  • The Tao of Unicode Sparklines

    Unicode evolves, of course, so maybe there will someday be a sequence of characters that’s friendlier to sparklines. Maybe there already is? If so please let me know, I’d love to use it.

  • Laura Abbott: Fun with the LPC55S69

    I never posted about it but at the end of April I disclosed a bug in an NXP chip as part of my work at Oxide. The short summary is there was an undisclosed hardware block in the LPC55S69 which allowed for modification of the ROM and breaking of various isolation boundries. Oops?

  • Implicit ordering in relational languages

    I tried implementing a text crdt in sql and in imp.

    Doing this naively isn't particularly hard. The challenge here is to implement it as if writing a batch query, but in such a way that an incremental system like materialize or dida can efficiently update the result when new edits arrive. Not because this code would be particularly useful in itself, but because it helps discover the boundaries of what kinds of problems are possible to solve in this way.

    The exercise is a little like GPU programming, in that avoiding sequential algorithms and shared mutable data-structures requires very carefully separating the actual essential data dependencies of the problem from those accidentally introduced by typical programming techniques.

  • Working with Postgres types

    In episode 2 of this series I noted that the languages in which I’m writing Postgres functions share a common type system. It took me a while to understand how types work in the context of Postgres functions that can return sets of records and can interact with tables and materialized views.

  • This week in Chrome OS: Chrome OS 92 hits stable

    It’s been quite a busy week for Chrome OS and Google in general. Google kicked off the week by officially previewing the upcoming Pixel 6 and Pixel 6 Pro smartphones. While that’s not Chrome OS news directly, the Google-made Tensor chip could have future implications for Chromebooks. In the middle of the week, Chrome OS 92 finally hit the stable channel, bringing a host of new features with it. AT&T also put up the LTE version of the Galaxy Chromebook Go for sale on their website.

    In addition to all of the current news, there were also encouraging developments in upcoming Chrome OS features. Chromebooks will soon gain native Google Calendar support in the dock. Debian 11 ‘Bullseye’ is rolling out to Chromebooks soon, available on certain devices now. The guys over at Chrome Unboxed were also able to get Vulkan games working in Crostini on Chrome OS Canary 94. Let’s take a look at everything in more detail.

  • How to Install AnyDesk on Ubuntu 20.04 LTS (Focal Fossa)

    AnyDesk is remote desktop application which allows to connect to remote desktop. It is platform independent and proprietary software which allow to connect Windows Server from Linux Desktop and vice-versa. Anydesk can be used specially in troubleshooting the remote systems. Apart from desktop sharing it can also be used for file transfer and VPN.

    In this article, we will demonstrate how to install anydesk tool on Ubuntu 20.04 LTS system.

»

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

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